--[[---------------------------------------------------------------------------------------

	LSPD
	Created by WolfKnight
	
	For discussions, information on future updates, and more, join 
	
	MIT License

	Copyright (c) 2020 WolfKnight

	Permission is hereby granted, free of charge, to any person obtaining a copy
	of this software and associated documentation files (the "Software"), to deal
	in the Software without restriction, including without limitation the rights
	to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	copies of the Software, and to permit persons to whom the Software is
	furnished to do so, subject to the following conditions:

	The above copyright notice and this permission notice shall be included in all
	copies or substantial portions of the Software.

	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	SOFTWARE.

---------------------------------------------------------------------------------------]]--

UTIL = {}

-- Returns a number to a set number of decimal places
function UTIL:Round( num, numDecimalPlaces )
	return tonumber( string.format( "%." .. ( numDecimalPlaces or 0 ) .. "f", num ) )
end 

-- The custom font used for the digital displays have the ¦ symbol as an empty character, this function 
-- takes a speed and returns a formatted speed that can be displayed on the radar 
function UTIL:FormatSpeed( speed )
	-- Return "Err" (Error) if the given speed is outside the 0-999 range 
	if ( speed < 0 or speed > 999 ) then return "Err" end 

	-- Convert the speed to a string 
	local text = tostring( speed )
	local pipes = ""

	-- Create a string of pipes (¦) for the number of spaces
	for i = 1, 3 - string.len( text ) do 
		pipes = pipes .. "¦"
	end 
	
	-- Return the formatted speed
	return pipes .. text
end 

-- Returns a clamped numerical value based on the given parameters 
function UTIL:Clamp( val, min, max )
	-- Return the min value if the given value is less than the min
	if ( val < min ) then 
		return min 
	-- Return the max value if the given value is larger than the max
	elseif ( val > max ) then 
		return max 
	end 

	-- Return the given value if it's between the min and max
	return val 
end 

-- Returns if the given table is empty, includes numerical and non-numerical key values
function UTIL:IsTableEmpty( t )
	local c = 0 

	for _ in pairs( t ) do c = c + 1 end 

	return c == 0
end 

-- Credit to Deltanic for this function
function UTIL:Values( xs )
	local i = 0

	return function()
		i = i + 1
		return xs[i]
	end
end

-- Old ray trace function for getting a vehicle in a specific direction from a start point
function UTIL:GetVehicleInDirection( entFrom, coordFrom, coordTo )
	local rayHandle = StartShapeTestCapsule( coordFrom.x, coordFrom.y, coordFrom.z, coordTo.x, coordTo.y, coordTo.z, 5.0, 10, entFrom, 7 )
	local _, _, _, _, vehicle = GetShapeTestResult( rayHandle )
	return vehicle
end

-- Returns if a target vehicle is coming towards or going away from the patrol vehicle, it has a range 
-- so if a vehicle is sideways compared to the patrol vehicle, the directional arrows won't light up 
function UTIL:GetEntityRelativeDirection( myAng, tarAng )
	local angleDiff = math.abs( ( myAng - tarAng + 180 ) % 360 - 180 )

	if ( angleDiff < 45 ) then 
		return 1
	elseif ( angleDiff > 135 ) then 
		return 2
	end 

	return 0
end

-- Your everyday GTA notification function 
function UTIL:Notify( text )
	SetNotificationTextEntry( "STRING" )
	AddTextComponentSubstringPlayerName( text )
	DrawNotification( false, true )
end

function UTIL:Log( msg )
	-- print(msg)
end 

function UTIL:DrawDebugText( x, y, scale, centre, text )
	SetTextFont( 4 )
	SetTextProportional( 0 )
	SetTextScale( scale, scale )
	SetTextColour( 255, 255, 255, 255 )
	SetTextDropShadow( 0, 0, 0, 0, 255 )
	SetTextEdge( 2, 0, 0, 0, 255 )
	SetTextCentre( centre )
	SetTextDropShadow()
	SetTextOutline()
	SetTextEntry( "STRING" )
	AddTextComponentString( text )
	DrawText( x, y )
end

--[[The MIT License (MIT)

	Copyright (c) 2017 IllidanS4

	Permission is hereby granted, free of charge, to any person
	obtaining a copy of this software and associated documentation
	files (the "Software"), to deal in the Software without
	restriction, including without limitation the rights to use,
	copy, modify, merge, publish, distribute, sublicense, and/or sell
	copies of the Software, and to permit persons to whom the
	Software is furnished to do so, subject to the following
	conditions:

	The above copyright notice and this permission notice shall be
	included in all copies or substantial portions of the Software.
	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
	OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
	HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
	WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
	FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
	OTHER DEALINGS IN THE SOFTWARE.

	The below code can be found at: https://gist.github.com/IllidanS4/9865ed17f60576425369fc1da70259b2
]]

local entityEnumerator = {
	__gc = function(enum)
		if enum.destructor and enum.handle then
			enum.destructor(enum.handle)
		end

		enum.destructor = nil
		enum.handle = nil
	end
}

local function EnumerateEntities(initFunc, moveFunc, disposeFunc)
	return coroutine.wrap(function()
		local iter, id = initFunc()
		if not id or id == 0 then
			disposeFunc(iter)
			return
		end

		local enum = {handle = iter, destructor = disposeFunc}
		setmetatable(enum, entityEnumerator)

		local next = true
		repeat
			coroutine.yield(id)
			next, id = moveFunc(iter)
		until not next

		enum.destructor, enum.handle = nil, nil
		disposeFunc(iter)
	end)
end

function UTIL:EnumerateVehicles()
	return EnumerateEntities(FindFirstVehicle, FindNextVehicle, EndFindVehicle)
end